Machine tool and the like



Dec. 6, 1938. R. STUHLMACHER MACHINE TOOL AND THE LIKE Filed A ril so, 1955 6 Sheets-Sheet l I'YJ 9 Dec. 6, 1938.

R. STUHLMACHER 2,138,987 MACHINE TQOL AND THE LIKE Filed April 50, 1.935 e Sheets-Sheet 2 Dec. 6, 1938. sf 2,138,987

MACHINE TOOL AND THE LIKE Filed April so, 1935 6 Sheets-Sheet 5 19 23 A /y If 1 43 3 v 38 4 7 2 a0 21 a C SIV.

, fig] 7a Ill/II I fnverzl o/v' Edie/n Jz iz Zmz'zcler A Timnay 6, 1938. R. STUHLMACHER MACHINE TOOL AND THE LIKE Filed April 30, 1935 6 Sheets-Sheet 5 Bic/Zara Jfulz-macleh Dec. 6, 1938. R. STUHLMACHER MACHINE TOOL AND THE LIKE 6 Sheets- Sheet 6 Filed April 30, 1935 Fig. 43

I77 vevzzor: Bahia/1i JZ ulZ-macer Patented Dec... 6, 1938 UNITED STATES PATIENT OFFICE many, assignor to wanderer-werke vorm.

Winklhofer & Jaenicke Akt.-Ges., Schonau, near Chemnitz, Germany Application August 30, 1935, Serial No. 38,638

In Germany September 3, 1934 11 Claims.

bracing member made in one piece and disposed between-the standard and the overarm.

By way of example, several embodiments of the invention are illustrated in the-accompanying drawings, in which Figure 1 is a front view of a surface milling machine-with two standard.

members; Fig. 2, a top view of Fig. 1; Fig. 3, a side view thereof; Fig. 4, asectional view of 2 one form of a detail of the machine on the line 4-4,. of Fig.. 1; Figs. 5 and 6 are sectional views of further details on the lines 5-5 and 6-6, of Figs. 2, 3 and 4; Fig. 7 shows another form of a detail of the machine shown in Fig, 4; Fig. 8 shows still anothereform of a detail of the machine shown intFigs. 4 and 7; Fig. 9 is a front view of a column milling machine embodying the invention; Fig. 10, a top view of Fig. 9; Fig. 11, a front view of a single standard milling machine with a slide movable on the standard; Fig. 12, a'top view of Fig. -11; Fig. 13, a side view thereof; and Fig. 14, a sectional view on an enlarged scale of a detail of this machine.

The embodiment of the invention illustrated in Figs. 1 to 8 represents a surface milling machine, in which a slide 4 carrying preferably a milling spindle II is guided between two parts 2 and 3 of the machine standard I so as to be displaceable in vertical direction. On the top of the milling slide 4, by means of a dovetailed connection, an overarm 5 is displaceably'arranged, on the underside of which a bracket 6 for the front end of the milling spindle II carrying the cutter I0 is guided and can be clamped in position. Between the overarm 5 and the standard members 2, 3 a bracket-like bracing member I is provided which, according to the invention, multilaterally supports the overarm 5, prefers ably on its two skies in several directions.

The bracing member I can be pressed with its rear surfaces I4, I5 against the front surfaces I6, ll of the standard members 2, 3, the surfaces I4, 15 being dimensioned so as to produce ample clamping or supporting. surfaces. bracing member I is guided in the slides 8 and The 9 of the standard members 2, 3 and by the operation of a single tension member I9 can be pressed against the standard members 2, 3, owing to the tightening of the guides 20, 2| disposed in the slides 8, 9 by the member I9.

Clamping of the overarm 5 and the bracing -member I is effected by the actuation of a fastening member 22 which need not be released during vertical adjustment of the slide k v For locking themilling slide 4 if no bracing member I is used for the overarm 5 as for instance during working of bulky jobs with a'cutter head, a screw I8 is provided which acts upon the inclined surfaces 26, 21 of the standard members 2, 3 by means of the wedges 24, 25. To push back the overarm 5 entirely it is merely necessary to loosen the fastening member 22.

The device for clamping the bracing member I to the standard members 2, 3 as well as the overarm 5 in the bracing member I can be constructed in various ways. I

a pressure ,liquid, preferably oil under pressure, isavailable, the construction shown in Fig. 4 can preferably be chosen, which permits clamping of the overarm 5 automatically by hydraulic means or byhand. The tension member I9 is preferably disposed-in the bracing member I and projects therefrom with its front part whereas its rear part is guided by a bridge member 23 serving for the reception of a pressure member 28. The bridge 23 is positioned between the standard members 2, 3 and, together with the' covering plate 29, forms a casing for the pressure member 28 which can be expanded by means of a pressure liquid. On being relieved, the pressure member 28 assumes again its original shape, owing to its elastic properties.

The pressure liquid is fed to the pressure member 28 by a piping through the connection 3|], the pressure member being either a metallic expa'nsion member or a rubber pad, preferably consisting of several parts. The expansion of the pressure member 28 is utilized for displacing the tension member I9 which may have the form of cooperate with the inclines 31, 38 of the pressure parts 39, 48 which like the tension member |9 are positioned in the bracing member 1. As shown in Figs. 3, 4 and 5, the pressure parts 39; 40 have additional inclines 4|, 42 which act upon the inclines 43, 44 of the clamping bolts 45, 46 vertically disposed relative to the pressure When the pressure member 28 is subjected to the pressure of the pressure liquid, it will expand accordingly, and this expansion is transmitted by the covering plate 29 to the tension member l9 which, for instance with a head extends behind the plate 29. The expansion of the pressure member 28 causes a longitudinal displacement of the tension member l9 and thus of the intermediate member 3| in the direction of the pressure member 28. 'Owing to this displacement of the intermediate member 3| the pressure parts 39, 48 are moved apart, so that the clamping bolts 45,

. 46 are caused toact upon the guides 26, 2| and bring about the tightening thereof. As a result, the bracing member will hug with its rear faces |4, |5 the fronts |6, H of the standard members 2, 3 and thereby clamp the overarm 5 in position.

If the tension member I9 is actuated by hand by tightening the nut 33, the intermediate member 3| will move in longitudinal direction relative to the tension member I9,- as the nut 33 is pressed against the cap 32. Owing to the unscrewing .oi: the tension member |9, the intermediate member 3| will then be displaced in the direction of the pressure member 28 in such a .way that the tension member I9, with respect to the pressure parts 39, 40, the clamping bolts 45, 46 and the guides 28, 2|, will have the same effect as during the hydraulic operation described.

As can be seen particularly in Fig. 5, the guides for the pressure parts 39, 48 in the bracing member 1 and the clamping bolts 45, 46 are made continuous, and it i s therefore possible to insert the pressure parts .and bolts in their guides from without. The guides can then be closed'by screw plugs.

The clamping of the overarm 5 to the bracing member 1 by means of the fastening member 22 is shown in Fig. 6. In the construction shown, the fastening member 22 consists substantially of a screw which during-tightening of the nut 52 is displaced in longitudinal direction. The fastening member 22 comprises further the wedges 53, 54 which are attached to it. The inclines 55, 56 of the wedges 53, 54 act upon corresponding inclines 51, 58 of the intermediate members 59, 68 which, by their inclines 6|, 62 exert pressure.

upon the inclines 63, 64, which face them, of the drawbolts 65, 66. The fastening member 22 with the wedges 53, 54 as well as the intermediate members 59, 68 and the draw bolts 65, 66 are accommodated in the bracing member 1, the bolts 65, 66 being connected with the slide ways 61, 68 in the guides 69, 18 of the overarm 5.

When the fastening member 22 is displaced in longitudinal direction by the tightening of the nut 52, this motion will be transmitted by the wedges 53, 54 to the intermediate members 59, 68 which in turn act upon the draw bolts 65, 66 which are thus moved and effect a double-sided faces 35, 36 which may also be conical and which bracing of the overarm 5 and the bracing member 1. The form of clamping device shown in Fig. 'I-

is suited for the purely mechanical clamping of the overarm 5- by manual operation of the tension member l9. In this case, instead of a pressure member 28 according to Fig. 4, a correspondingly recessed tensioning piece 1| is provided and so constructed that with its outer edge it is located in the clearances 12, 13 of the standard members 2, 3. The construction of the power transmitting means, such as the tension member |9, the intermediate member 3|, the pressure parts 39, 48 and the other members resembles that shown in Fig. 4. v

For simultaneously clamping the bracing member 1 to the standard members .2, 3 and the overarm 5 the construction according to Fig. 8 is provided with a single tension member 14 which carries the two sleeves 15, 16, the sleeve 15 cooperating with the pressure parts 11, 18 for influencing the overarm 5 andthe sleeve 16 coacting with the pressure parts 19, 88 for adjusting the bracing member 1. The pressure parts 11, 18 and 19, 88 are actuated during the longitudinal displacement of the tension member 14 by means of the inclines 8|, 82 on the sleeve #15 and inclines 83, 84 on the sleeve 16, the. inclines-being replaceable by conical surfaces. The sleeve 15 is attached to the tension member 14 so as to leave an interstice and is supported by a collar 86 thereof, whereas the sleeve 16 is connected with v the tension member 14 by means of a thread.

In this way it becomes possible, in case of inaccuracies due .to irregularities in the construc- .tion 'of the transmission members, to clamp the bracing member 1 to the overarm 5 and the standard members 2, 3 also laterally and successively without interfering with'safe clamping.

This clamping device can be manually operated by tightening the square head 81 of the tension member 14. The other parts for transmitting power from the tension member .14 to the bracing member 1 or the overarm 5 are constructed like those described iii-connection with the constructions previously mentioned.

The clamping device'can further be constructed so thatthe pressure parts are arranged radially. with respect to a common center and are operated from a common tension member, the pressure members being also displaced by wedge effects in longitudinal direction to initiate the clamping of the overarm 6 and the bracing member 1. In a construction of this kind force is transmitted as described.

Another construction of the clamping device comprises pressure parts in the form of members resembling balance beams and engaging the ends of the clamping bolts which are pressed together .when the wedges or similar means are tightened.

In ,ali'embodiments of the invention the wedges or similar means employed for the purpose stated can beprovided with means for reducing friction.

The second embodiment of the invention according to Figs. 9 and represents a milling 'machine having a standard 96 and a headstock' 91 non-adjustably disposed in vertical direction. By means of the screws 9|, 92, 93, 94 a bracing member 98, which is a single piece, is fixably secured to the standard 96, the member 98 hugging with its faces 98, 99 the lateral faces I89, |8| of the standard 96. The member 98 has a continuous guide I82, preferably of dovetailed cross section, for receiving the overarm I83 being in which may be screws, are provided which act upon the tension parts I06, I01 which are disposed in the continuous bores I00, I09 of the bracing. member 90. Each tensioning. part I06, I01 has a clearance IIO, one boundary surface of which is inclined, the inclination gf this surface corresponding to that of the ob lique-side face of the dovetailed portion of the overarm' I03 facing'it, When the parallel tensioning pieces I06, I01 disposed on the same level are tightened by the turning of the fastening members I04, I05, the inclined boundary surface of the respective tensioning part I06 or. I01 will hug the corresponding surface of the overarm I03 and thus clamp the latter to the bracing memher 90.

The construction according to Figs. 11 to 14 represents a milling machine with a one-part standard -II4 carried by the machine base II3. A slide I 23 is vertically displaceable on the standard, and the overarm I42 disposed on the slide I23 issupported in several directions by a onepart bracing. member I I5 between the standard H4 and the overarm I42. The supporting faces 945, I46, I47 of the bracingmember I I5 withp respect to'the standard II4-or the overarm I42 are preferably arrangedin planes forming a right angle, so that the overarm I42 is protected against rotation both towards the right and left (Fig; 12) This angular constructionof the brace H5 and the detachable fastening of the latter by tensioning means relative to the standard II4 bring it about that when the bracing member I I6, is fixed relative to the standard I I4, the slide I23 is simultaneously firmly connected with the. standard also. v

The tens'ioning. means, e. g. screws, are connected with guides II! .which are arranged in 'a continuous groove I20 of the standard II4. The latter has also a guide I.2I provided with a wedgelike surface I22.on which the carriage 123 is guided during itsvertical motion. The slide I23 has a projecting portion I25 for insuring accurate and preferably adjustable guiding thereof. For adjusting the slide I23 in vertical direction serves ascrew I26. .The slide I23 may further be constructed so that the supporting surface I46 of the-bracing member I I5 can be pressed against it, whereby during clamping of the bracing mem ber II5 to the standard II4 the slide I23 is fixed also with respect to the standard.-

For fixing the overarm I42 to the bracing member Ilia fastening member I21, such as 'a screw, is provided, though of course several screws may be used also. The screw I2 l need not be unscrewed during the vertical adjustment of the slide I23. Besides the fastening member I21, as shown in Fig. 14, several guiding pins I30, I3I, cushioned by the springs I26, I29, and an intermediate layer I32 serving as sliding face for the relative displacement of the bracing member II! and the overarm I42 are providedon the bracing member H5. The pins I30, I3I engage a guide I40 which duringadjustment of the overarm I42 isguided in the T-shaped groove I of the overarm I42 which is disposed in a'dovea chuck I33 for the tool carrier or the-tool itself,

in the present instance for the spindle I34 carrying a cutter I35, and the chuck I33 is fixed by .means of the screw I36. Drive comes from the shaft I31, so that, in the construction shown, the

bracing member II5 connects the overarm I42 with the standard II4 and also fixes the slide I23.. If the tool with the slide I23 is to be adjusted vertically, it -is only necessary to loosen the tensioning means III, H8. The slide I23 further receives a screw I38 which serves for clamping it if no bracing member H5 is used.

" Icl'aim: 1. A machine tool, particularly a milling ma- -chine, comprising a machine standard, a working spindle, means for supporting the working spindle, an overarm, a one-part bracing member for supporting said overarm in a number of directions relative to said standard and embracing it from a number of sides, a tension member for fixing the overarm relative to thebracing member and the bracing member -relative to the standard,-a-plurality of guide members for connecting the bracing member with the standard,

and a plurality of wedge-like. intermediate memv 'bers cooperating with the tension member for fixing said guide members.

' 2.. A machine .tool, particularly a' milling ma- .chine, comprising a machine standard, a working spindle, means for supporting the working spindle, an overarm, a one-part bracing member for supporting said overarm in -a number of directions relative to said standard and embracing it from a number of sides, a tension member for fixing the overarm relative to the bracingmember and the bracing member relative to the standard, a plurality of guide memliers for connecting the bracing member with the overarm,

.and a plurality of wedge-like intermediate mem-' bers cooperating with the tension member for fixing said guide members.

3. A machine tool, particularly a milling machine, comprising a machine standard, a working spindle, means for supporting the working spindle, an overarm, a one-part bracing member for supporting said overarm in a number of directions relative to said standard and embracing it from a number of sides, a tension 4. A machine tool, particularly a milling machine, comprising a machine standard, a slide ar'-, ranged on the machine standard, said slide carrying a working spindle, an overarm carried and guided by the slide and projecting freely from the standard, means for supporting the working, spindle, said means being arranged at the projecting part of the overarm, a one part bracing member for supporting the. overarm on the standardsaid one part bracing member having guides adapted to connect it with the standard and the overarm, a guide on said standard being adapted to engage the corresponding guide of :the bracing member, and a wedge-like guide on the slide pressed against a corresponding guide on said standard by means of one of the guides on the bracing member when the bracing memher is beingflxed.

5 A machine tool, particularly a milling inaed with the standard and the overarm, and a fastening means for clamping the overarm to the bracing member from both sides.

' 6. A machine tool, particularly a milling machine, comprising a machine standard, a slide arranged on the machine standard, said slide carrying a working spindle, an overarm carried and guided by the slide and projecting freely from the standard, means forsupporting the working spindle, said means being arranged at the projecting part of the overarm, a one part bracing member for supporting the overarm on the standard, said one part bracing member being connected with the standard and the overarm, and

a manually operated tension means for fixing the bracing member relative to the standard.

7. A machine tool, particularly a milling machine, comprising a standard, an overarm for the standard and having is projecting portion between the standard and the overarm, said overarm, projecting portion, and standard each having a supporting face, and a one-part bracing member secured to the standard and overarm for rigidly supporting the overarm from the standard, said bracing member having three surfaces contacting with the three faces on the standard, projecting portion and the overarm.

8. A machine tool according to claim "I, in which the bracing member is formed as a substantially right-angled triangle as viewed-from the top in which the two sides of the ri ht angle include the three contacting surfaces.

9. A machine tool, particularly a milling mafirst-mentioned wedge-like guides to clamp the bracing member with the overarm.

10. A machine tool, particularly a milling machine, comprising a machine standard, a slide arranged on the machine standard, said slide carrying a working spindle, an overarm carried and guided by the slide and projecting freely from the standard, means for supporting the working spindle, said means being arranged at the projecting part of the overarm, and a one part bracing member for supporting the overarm on the standard, said one part bracing member being positively connected with the standard and the overarm and being-disposedbetween the standard and overarm, and said bracing member having supporting faces forming a right angle relative to the standard and the overarm. 11. A machine tool,,particularly a milling machine, comprising a machine standard, a slide arranged on the machine standard, said slide carrying a working spindle and being displaceably arranged relative to the standard, an overarm carried and guided by the slide and projecting freely from the standard, means for sup porting the working spindle, said means being arranged at the projecting part of the overarm. and a one part bracing member for supporting the overarm on the standard, said one part bracing member being positively connected with the standard and the overarm and being detachably connected with the standard and the supporting faces thereof forming a right angle relative to the standard and the overarm.

' RICHARD BTUHIMACHER. 

